Solder for aluminum



Patented Jan. 1, 1929.

PATENT OFFICE.

UNITED *STATES JEREMIAH BUTLER, OI OXFORD, PENNSYLVANIA, ASSIGNOR OF ONE-HALF T ISAAC P. WALTON, OF OXFORD, PENNSYLVANIA.

SOLDIER FOR ALUMINUM.

11o Drawing.-

The present invention relates to an improved solder for various metals and larly for aluminum.

It is the purpose of the present invention 6 to compound a composition of matter constituting a very effective solder, one capable of adjoining opposing pieces of metal, namely aluminum, making a joint Very lasting as well as efficient, capable of withstanding 0 heavy strains.

It is to be understood that the particulars herein given are in no way limitive, and'that while still keepingv within the scope of the invention, any desired modification of details and' proportions may be made in the composition of matter according to circumstances.

' The invention comprises further features and combination of ingredients to be here inafter set forth and claimed.

The herein specified composition of matter consists of using a steel or cast iron vessel having a large surface bottom, in which requisite amount of steel filingsare deposited,

5 sufiicient heat being applied to bring the filings to a, red heat, a quantity of block tin, steel, borax, plaster of Paris, WitllSiLlt, all of which is und or reduced to a fine state, the composition of matter consisting of the block tin, steel, borax, plaster of Paris, and salt being deposited in the molten metal, reduced from the steel ings, reserving one-third of such composition of block tin, steel, borax, plaster ofParis and salt to beapplied to the matter within five minutes of the time of particu- Application filed December 30, 1927. Serial No. 243,772.

pouring the composition matter in a mold,

which is kept continually hot to a red heat for at least forty-five minutes, with silver added in the last five minutes while in a molten state.

In order to compound a quantity of twentyfive "pounds the foregoing ingredients are compounded in the following proportions, to wit:

Steel filings 1 lb. Block tin 25 lb. Steel oz. Borax 3 oz. Plaster of Paris a- 4 oz. Salt 1 lb. Silver 12 oz.

While these proportions are herein named for making twenty-five pounds of solder for aluminum, it is obvious that to compound a greater quantity or a less quantity the various ingredients may be, proportionately increased or decreased.

The invention having been set forth, what is claimed is:

A composition of soldering matter for aluminum consisting of steel filings one pound, block tin twenty-five pounds, steel one-half ounce, borax three and one-half ounces, plaster of Paris four ounces, salt one pound, and twelve ounces of silver. p

In testimony whereof he 'a'flixes his signature.

JEREMIAH BUTLER. I 

